Influence of melt convection on microstructure evolution of Nd-Fe-B alloys using forced crucible rotation technique


Influence of melt convection on microstructure evolution of Nd-Fe-B alloys using forced crucible rotation technique

Biswas, K.; Hermann, R.; Filip, O.; Werner, J.; Gerbeth, G.; Priede, J.

The forced crucible rotation technique has been applied to the solidification of Nd-Fe-B alloys. Specially sealed samples were subjected to well-defined forced rotation during induction heating and solidification. The resulting microstructure of the Nd-Fe-B alloys in consideration of melt convection has been investigated using scanning electron probe microscopy. The determination of the α-Fe volume fraction by measuring the magnetic moment in a vibrating sample magnetometer (VSM) resulted in a distinct reduction of the α-Fe volume fraction in samples with high crucible rotation frequencies. Furthermore, a new category of experiment has been started where a tailored magnetic field was applied in order to study the microstructure evolution due to an enhancement or suppression of the melt convection by additional alternating magnetic fields.

  • Lecture (Conference)
    Tagung der Deutschen Physikalischen Gesellschaft, 09.03.2005, Berlin, Germany

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Publ.-Id: 7344